U.S. astronaut Michael Lopez-Alegria trains in the CF-18 centrifuge in the Star City space centre near Moscow August 16, 2006. Lopez-Alegria is due to launch aboard a Russian Soyuz rocket to the International Space Station in September. REUTERS/Sergei Remezov (RUSSIA)

U.S. astronaut Michael Lopez-Alegria trains in the CF-18 centrifuge in the Star City space centre near Moscow August 16, 2006. Lopez-Alegria is due to launch aboard a Russian Soyuz rocket to the International Space Station in September. REUTERS/Sergei Remezov (RUSSIA)